yes matthias that does sound right
was just stressing the importance of not exceeding the rail voltages
would really help to know the ccts cynosure is driving
it could be a 4017 based sequencer running on +5/-5 or equally it could be +5 and 0v with the -5v only used elsewhere

Quote:

power the sequencer parts of the lunetta using 0V on the Vss instead of -5. Then I can use the 5V option.

cynosure if that is possible to do with the particular lunetta sequencer's
it is not a bad option, though i cant imagine the cct was designed with -5v in mind and there not being a good reason for it [dual rail opamps somewhere ? ] otherwise you could go with a small interface to
offset the pulse voltage to the correct level as in matthias's option D
which maybe the better deal and easier
you could try the M2C with the 5v output first and see if it will clock your lunetta as is , I dont think it would harm anything [ guessing here really ]and if that does not work then tack a small interface cct on the front end of the lunetta to offset the level to -5 low to 0v high_________________In an infinite universe one might very well
ask where the hell am I
oh yeah thats right the land of OZ
as good an answer as any

so Vdd is +5V and Vss is -5V.
however i have to correct myself. the threshold of i.e. CD4017 would be at approx. +2V then. (High Level Input Voltage is 7V for 10V operation according datasheet).
so just be sure to not exceed the +5V on the lunetta's input.

however i have to correct myself. the threshold of i.e. CD4017 would be at approx. +2V then.

Doh i should have seen that as well
So the M2C should clock the lunetta fine with its outputs set at +5v_________________In an infinite universe one might very well
ask where the hell am I
oh yeah thats right the land of OZ
as good an answer as any

Sorry - I was entrapped with soldering a wasp filter (your name on the schematic Matthias, so thanks for that one too).

The thing that the clock will actually be triggering is a 4040. I know the MIDI2CLOCK has a divider in it, but i included one in my sequencer too for use when clocking from other lunetta devices. The output of the 4040 then goes to a 4029, which is decoded using a 4514.

Thanks for the info. I don't have the MIDI2CLOCK soldered up yet (working on the synth/sequencer it controls first), but I can easily breadboard a 5/0V clock pulse to test it out.

yes, this would be good. i wonder if the 0V is low enough for the CMOS powered by -5V/+5V...
if not you will have to do it the way i recommended: use 0V/10V triggers and move them down to -5V/+5V on the lunetta side._________________
cheers,
matthias
____________
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FYI. Now that the cmos synth is done, I have tested it out with a 40106 clock on breadboard using a 9V battery and a 7805. It clocks the sequencer if I add a capacitor to the +5 clock pulse and don't use the clock to also power an led. Maybe a current issue?

Anyway, it should work with the 5V option on the midi2clock pcb once I get around to soldering that together. At most, i might need to add a cap on the output.

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